A portable pruning device for garden maintenance work

Abstract

This utility model discloses a convenient pruning device for garden maintenance, comprising: a movable platform; a rotating part having a rotating base and a rotating disk, the rotating disk having a telescopic base and a telescopic column that extends vertically on the telescopic base, the top of the telescopic column having an assembly ball; and a pruning kit detachably mounted on the assembly ball of the rotating part, the pruning kit having a motor base, a handle, a telescopic motor, a telescopic rod, and a pruning unit, the bottom of the motor base having a spherical assembly groove and a pressure ring, the assembly ball being limited in the spherical assembly groove by the pressure ring, allowing the motor base to swing freely with the assembly ball as a fulcrum. This utility model provides stability through the movable platform, provides a wide range of working angles in the horizontal plane through the rotating part, and provides flexible posture adjustment in the vertical plane through the connection method of the spherical assembly groove and the assembly ball, thus expanding the working range and reducing the labor intensity of the operator.

Description

Technical Field

[0001] This utility model relates to the technical field of garden maintenance operation devices, and in particular to a convenient pruning device for garden maintenance operations. Background Technology

[0002] In garden maintenance, pruning devices used for trimming branches at height typically include manual telescopic pruners, powered pruners or saws, and vehicle-mounted aerial work platforms. Manual telescopic pruners generally consist of a telescopic pole, a traction rope, and a shear head at the top. While these tools are simple in structure and low in cost, they rely on manual labor to pull the rope, resulting in high workload and low efficiency, especially when dealing with thicker branches. Furthermore, the long pole lacks rigidity when fully extended, causing significant wobbling at the pole head during operation, leading to highly inaccurate positioning and often requiring multiple attempts to complete the cut, posing a safety hazard. Powered pruners or saws incorporate a gasoline engine or electric motor at the bottom or top of the pole, driving the saw blade or shear head at the top via a drive shaft or direct drive. While these tools reduce labor costs, the integrated power unit significantly increases the overall weight, making operation cumbersome, difficult to move, and prone to operator fatigue. The vibration generated by the motor is amplified through the pole, exacerbating the shaking at the end of the workpiece, further highlighting the inaccurate positioning problem and actually reducing operability. Vehicle-mounted aerial work platforms allow operators to stand on the platform and use tools. While these devices solve the height problem, they are bulky, expensive, and extremely inconvenient to move and transport. They are unsuitable for small or scattered garden work environments and are only suitable for large-scale municipal or special projects. Utility Model Content

[0003] The purpose of this utility model is to provide a convenient pruning device for garden maintenance operations, so as to solve one or more technical problems existing in the prior art, and at least provide a beneficial option or create conditions.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0005] This utility model provides a convenient pruning device for garden maintenance, comprising:

[0006] Mobile platform;

[0007] The rotating part has a rotating seat and a rotating disk disposed on the rotating seat. The rotating seat is fixed on the movable platform. The rotating disk is provided with a telescopic base and a telescopic column that extends and retracts vertically on the telescopic base. The top of the telescopic column is provided with an assembly ball.

[0008] The pruning kit is detachably mounted on the assembly ball of the rotating part. The pruning kit has a motor base, a handle located at the rear end of the motor base, a telescopic motor mounted in the motor base, a telescopic rod connected to the telescopic motor, and a pruning unit located at the end of the telescopic rod. The bottom of the motor base is provided with a spherical assembly groove and a pressure ring. The assembly ball is limited in the spherical assembly groove by the pressure ring, so that the motor base swings with multiple degrees of freedom around the assembly ball as a fulcrum.

[0009] The pruning kit and rotating bracket of this technical solution are detachable and can be moved to the target garden or under the working tree via a mobile platform before use, making it easy to carry. When in use, simply place the pruning kit on the mounting ball of the rotating part and fix it with the pressure ring. Adjust the approximate horizontal direction of the telescopic column by rotating the rotating part, and then raise and lower the telescopic column to the required height. The operator holds the handle, and the entire pruning kit swings with the mounting ball as the fulcrum, accurately aligning the pruning unit with the target branch. The operator then controls the pruning unit to prune the target branch.

[0010] As an extension of the above solution: the movable platform has reserved space for placing the pruning kit, and the bottom of the movable platform is equipped with omnidirectional casters. The omnidirectional casters allow the device to be easily moved and positioned in gardens with complex terrain. The reserved space on the platform is used to store the pruning kit, realizing the integrated mobility of tools and power supply, and improving the continuity and convenience of operation.

[0011] As an extension of the above solution: the pressure ring is fixed on the spherical assembly groove by a quick-release component, and the inner diameter of the pressure ring is smaller than the diameter of the assembly sphere.

[0012] This extended solution enables quick installation and disassembly between the pruning kit and the telescopic column, allowing operators to complete the assembly and disassembly by hand in a short time. It facilitates transportation, storage, and switching of operating modes. The design of the pressure ring inner diameter being smaller than the ball diameter ensures that the ball is reliably contained within the ball groove and will not fall off.

[0013] As an extension of the above solution, an adjustable counterweight is provided at the end of the handle. By adding or removing the counterweight at the end of the handle, the torque generated by the front weight can be balanced, making it easy and effortless for the operator to hover the pruning kit at any angle, greatly reducing fatigue and improving control accuracy and stability.

[0014] As an extension of the above solution: the motor mount is equipped with at least three hydraulic locking cylinders. Each hydraulic locking cylinder includes a radial piston chamber surrounding the spherical assembly groove and a piston disposed within the radial piston chamber. Friction blocks are embedded at the ends of the pistons. The hydraulic locking cylinders provide a stable and uniform locking force, solving the wobbling problem that may occur during operation of the multi-swinging spherical assembly. The multi-piston radial design applies pressure to the sphere simultaneously from all sides, securing it firmly and effectively resisting the impact of motor vibration and shear reaction forces, ensuring precise positioning during trimming.

[0015] As an extension of the above solution: a manual pump is installed on the handle, which is connected in sequence to the hydraulic control pipes of the release valve and the hydraulic locking cylinder via hydraulic lines. Integrating the manual pump into the handle allows the operator to naturally apply pressure by squeezing the pump while maintaining a gripping posture. The locking operation is seamlessly connected, the release valve enables rapid unlocking, and the hydraulic locking cylinder drives the friction lining to apply uniform radial pressure to the surface of the assembled ball, generating significant static friction. This transforms the flexible connection into a rigid connection, effectively suppressing vibration and displacement during operation.

[0016] As an extension of the above solution: the motor base is equipped with an oil reservoir, which is connected to the hydraulic locking cylinder via a hydraulic pipeline to store compensating hydraulic oil. The oil reservoir can compensate for changes in oil volume caused by temperature variations, minor leaks, or repeated operations, maintaining stable oil pressure within the hydraulic locking cylinder and ensuring effective locking action each time, thus avoiding locking failure due to insufficient oil.

[0017] As an extension of the above solution, the pruning unit includes one of the following: electric shears, a circular saw blade assembly, or a hedge trimmer. This achieves multi-functionality, improving the practicality and economy of the equipment.

[0018] As an extension of the above solution: the telescopic rod end is provided with a male connector and a first locking pin, the tail of the pruning unit is provided with a female connector that matches the male connector and a second locking pin that corresponds to the first locking pin, the pruning unit is fixed to the end of the telescopic rod by the cooperation of the first locking pin and the second locking pin and is electrically connected by the cooperation of the female connector and the male connector.

[0019] This extended solution enables quick replacement, the male and female connectors ensure reliable power transmission, and the locking pins provide a robust and quick-locking mechanical connection.

[0020] As an extension of the above solution: the electrical cable of the male connector is connected to a control switch mounted on the handle via the internal hollow channel of the telescopic rod. This extension solution encloses all cables inside the telescopic rod, preventing damage caused by external exposed cables being scratched, tangled, or pulled by tree branches, thus improving the professionalism and lifespan of the equipment. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0022] Figure 1 This is a schematic diagram of the pruning device in the embodiment;

[0023] Figure 2 This is a schematic diagram of the internal structure of the pruning device in the embodiment;

[0024] Figure 3 yes Figure 2 A magnified schematic diagram of the structure at point A.

[0025] In the attached diagram: 100: Movable platform, 110: Universal caster, 200: Rotating part, 210: Rotating seat, 220: Rotating disk, 230: Telescopic base, 240: Telescopic column, 250: Assembly sphere, 300: Pruning kit, 310: Motor base, 311: Spherical assembly groove, 312: Pressure ring, 313: Hydraulic locking cylinder, 314: Oil reservoir, 3131: Radial piston chamber, 3132: Piston, 3133: Friction liner, 320: Handle, 321: Adjustable counterweight, 322: Manual pump, 323: Release valve, 330: Telescopic motor, 340: Telescopic rod, 350: Pruning unit. Detailed Implementation

[0026] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0027] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] In the description of this utility model, if there are words such as "several", they mean one or more, "multiple" means two or more, "greater than", "less than", "exceeding" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself.

[0029] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0030] Reference Figures 1 to 3 The following are several embodiments of a convenient pruning device for garden maintenance operations according to this utility model.

[0031] In some embodiments, such as Figures 1 to 3 As shown, this utility model provides a convenient pruning device for garden maintenance operations, comprising:

[0032] 100 mobile platforms;

[0033] The rotating part 200 has a rotating base 210 and a rotating disk 220 disposed on the rotating base 210. The rotating base 210 is fixed on the movable platform 100. The rotating disk 220 is provided with a telescopic base 230 and a telescopic column 240 that extends vertically on the telescopic base 230. The top end of the telescopic column 240 is provided with an assembly ball 250.

[0034] The pruning kit 300 is detachably mounted on the mounting ball 250 of the rotating part 200. The pruning kit 300 has a motor base 310, a handle 320 disposed at the rear end of the motor base 310, a telescopic motor 330 mounted in the motor base 310, a telescopic rod 340 that is drivenly connected to the telescopic motor 330, and a pruning unit 350 disposed at the end of the telescopic rod 340. The bottom of the motor base 310 is provided with a spherical mounting groove 311 and a pressure ring 312. The mounting ball 250 is limited in the spherical mounting groove 311 by the pressure ring 312, so that the motor base 310 swings with the mounting ball 250 as the fulcrum with multiple degrees of freedom.

[0035] In this embodiment, the pruning kit and the rotating bracket are detachable and can be moved to the target garden or under the working tree via a mobile platform before use, making it easy to carry. When in use, simply place the pruning kit on the mounting ball of the rotating part and fix it with the pressure ring. Adjust the approximate horizontal direction of the telescopic column by rotating the rotating disc of the rotating part, and then raise and lower the telescopic column to the required height. The operator holds the handle, and the entire pruning kit swings with the mounting ball as the fulcrum in multiple degrees of freedom, accurately aligning the pruning unit with the target branch. The pruning unit is then controlled to prune the target branch.

[0036] This embodiment provides stability through a mobile platform, a rotating part provides a wide range of working angles in the horizontal plane, and the connection between the spherical assembly groove and the assembly sphere provides flexible posture adjustment in the vertical plane, thus expanding the working range and reducing the labor intensity of the operator.

[0037] In an optional embodiment, such as Figure 1 As shown, the movable platform 100 has a reserved space for placing the pruning kit 300, and the bottom of the movable platform 100 is provided with universal casters 110.

[0038] This embodiment addresses the core pain points of traditional high-branch pruning equipment, namely its inconvenient movement and cumbersome transport. The casters allow for easy movement and positioning in gardens with complex terrain, while the space reserved on the platform is used to store pruning kits, achieving integrated mobility of tools and power supply, thus improving operational continuity and convenience.

[0039] In an optional embodiment, such as Figure 2 and Figure 3 As shown, the pressure ring 312 is fixed to the spherical assembly groove 311 by a quick-release component. The inner diameter of the pressure ring 312 is smaller than the diameter of the assembly sphere 250. The quick-release component includes a quick-release screw or a snap-fit ​​structure. Alternatively, one end of the pressure ring can be connected to the motor base via a hinge shaft, and the other end can have a slot. A wrench with an eccentric cam is mounted on the motor base via a pin. Turning the wrench causes the cam to press into or disengage from the slot of the pressure ring, thereby achieving the tightening and loosening of the other end of the pressure ring, etc. This embodiment does not limit the quick-release component.

[0040] This embodiment enables quick installation and disassembly between the pruning kit and the telescopic column, allowing operators to complete the assembly and disassembly by hand in a short time. It facilitates transportation, storage, and switching of operating modes. The design of the inner diameter of the pressure ring being smaller than the diameter of the ball ensures that the ball is reliably contained within the ball groove and will not fall off.

[0041] To address the problem of excessively long lever arms and difficult operation caused by the weight of components such as motors and reducers, in one optional embodiment, such as... Figure 1 As shown, an adjustable counterweight 321 is provided at the end of the handle 320. By adding or removing the counterweight at the end of the handle, the torque generated by the front weight can be balanced, making it easy and effortless for the operator to hover the pruning kit at any angle, greatly reducing fatigue and improving control accuracy and stability.

[0042] In some preferred embodiments, the counterweight can be disassembled, replaced, and adjusted by hooking or screwing it into the end of the handle. For example, if the counterweight has a threaded center hole in the middle and the handle end has an external thread, one or more counterweights can be selected and screwed into the handle end for fixation according to actual usage requirements.

[0043] In an optional embodiment, such as Figure 3 As shown, the motor base 310 is provided with at least three hydraulic locking cylinders 313. Each hydraulic locking cylinder 313 includes a radial piston cavity 3131 disposed around the spherical assembly groove 311 and a piston 3132 disposed within the radial piston cavity 3131. A friction liner 3133 is embedded at the end of the piston 3132.

[0044] This embodiment provides a stable and uniform locking force, solving the wobbling problem that may occur during operation of multi-swinging spherical assemblies. The multi-piston radial design can apply pressure to the sphere from all sides simultaneously, locking it firmly and effectively resisting the impact of motor vibration and shear reaction forces, ensuring precise positioning during trimming.

[0045] In an optional embodiment, such as Figure 1 and Figure 2 As shown, a manual pump 322 is installed on the handle 320. The manual pump 322 is connected in sequence to the hydraulic control pipes of the release valve 323 and the hydraulic locking cylinder 313 via hydraulic lines. By integrating the manual pump into the handle, the operator can naturally apply pressure by squeezing the pump while maintaining a gripping posture. The locking operation is seamless, the release valve enables rapid unlocking, and the hydraulic locking cylinder drives the friction lining to apply uniform radial pressure to the surface of the assembly ball, generating a huge static friction force, thereby transforming the flexible connection into a rigid connection and effectively suppressing vibration and displacement during operation.

[0046] In an optional embodiment, such as Figure 3 As shown, the motor base 310 is equipped with an oil reservoir 314, which is connected to the hydraulic locking cylinder 313 via a hydraulic pipeline and is used to store compensating hydraulic oil. The oil reservoir can compensate for changes in oil volume caused by temperature changes, minor leaks, or multiple operations, maintain stable oil pressure in the hydraulic locking cylinder, ensure that each locking action is effective, and avoid locking failure due to insufficient oil.

[0047] In conjunction with one or more of the above embodiments, during operation, the release valve is in the open state, the pressure inside the hydraulic locking cylinder is reduced, the piston returns to its original position under the action of spring force or other reset force, the friction liner separates from the ball, and the operator can easily swing the motor base and pruning unit to the desired angle via the handle. After the angle is adjusted, the operator squeezes the manual pump on the handle to close the release valve. Here, the manual pump can also be implemented using other electric control methods to control the release valve, such as a small hydraulic pump driven by a miniature DC motor, controlled by a button on the handle. It should be noted that in this utility model, the release valve and the manual pump function as a control switch or trigger drive control signal. The hydraulic locking cylinder's hydraulic drive, hydraulic control, and return oil reset principles and operating methods are implemented using existing technology, which will not be elaborated further here.

[0048] Hydraulic oil is pumped from the reservoir into the piston chamber surrounding the assembly ball. It can pass through an annular oil passage in the motor base surrounding the spherical assembly groove. The oil inlets of multiple radial piston chambers are connected to the annular oil passage through oil holes. Hydraulic oil enters each piston chamber through the annular oil passage. The oil pressure pushes all pistons to move synchronously and radially toward the center of the spherical assembly groove, driving the friction liner to press tightly against the assembly ball. At this time, the assembly ball is locked.

[0049] The operator presses the control switch to start the pruning unit to perform cutting, or starts the telescopic motor to push the telescopic rod forward in a straight line through the transmission mechanism (such as gear rack, lead screw nut). The moving blade or saw blade installed at the end of the telescopic rod moves forward accordingly, and produces a cutting or sawing action with the fixed blade or guide plate to cut the branches.

[0050] When the angle needs to be adjusted after pruning, open the release valve. The high-pressure oil flows from the piston chamber back to the oil reservoir through the pipeline. The pressure is released, the piston retracts, and the friction liner disengages from the ball. The operator can easily swing the motor base and pruning unit to the desired angle using the handle. After the angle is adjusted, repeat the above operation to achieve high-altitude pruning.

[0051] In an optional embodiment, the pruning unit includes one of an electric shears, a circular saw blade assembly, or a hedge trimmer head. This embodiment achieves multi-functionality, improving the practicality and economy of the equipment. Users can quickly select the most suitable tool head according to the thickness and material of the branches (such as thin branches, thick trunks, and hedges) to meet complex garden maintenance needs without investing in multiple single-function devices.

[0052] In an optional embodiment, the telescopic rod end is provided with a male connector and a first locking pin, and the tail of the pruning unit is provided with a female connector that matches the male connector and a second locking pin that corresponds to the first locking pin. The pruning unit is fixed to the end of the telescopic rod by the cooperation of the first locking pin and the second locking pin and is electrically connected by the cooperation of the female connector and the male connector.

[0053] This embodiment enables a quick replacement function. The male and female connectors ensure reliable power transmission, and the locking pins provide a robust and quick mechanical connection, ensuring a simple and fast replacement process with reliable contact after connection, preventing loosening or power loss during operation.

[0054] In an optional embodiment, the electrical cable of the male connector is connected to a control switch mounted on the handle via an internal hollow channel in the telescopic rod. This embodiment conceals all cables within the telescopic rod, preventing damage from scratches, entanglements, or pulls by tree branches to exposed external cables, thus enhancing the equipment's professionalism and lifespan.

[0055] It should be noted that the electric scissors, circular saw blade assembly, hedge trimmer, male and female connectors, locking pins, and control switches in the above embodiments can all be directly purchased and are conventional accessories in the prior art. This application will not elaborate on the structure and principle of their function.

[0056] The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A convenient pruning device for garden maintenance, characterized in that, include: Mobile platform (100); The rotating part (200) has a rotating seat (210) and a rotating disk (220) disposed on the rotating seat (210). The rotating seat (210) is fixed on the movable platform (100). The rotating disk (220) is provided with a telescopic base (230) and a telescopic column (240) that extends vertically on the telescopic base (230). The top of the telescopic column (240) is provided with an assembly ball (250). The pruning kit (300) is detachably mounted on the assembly ball (250) of the rotating part (200). The pruning kit (300) has a motor base (310), a handle (320) disposed at the rear end of the motor base (310), a telescopic motor (330) mounted in the motor base (310), a telescopic rod (340) connected to the telescopic motor (330) in transmission, and a pruning unit (350) disposed at the end of the telescopic rod (340). The bottom of the motor base (310) is provided with a spherical assembly groove (311) and a pressure ring (312). The assembly ball (250) is limited in the spherical assembly groove (311) by the pressure ring (312) so that the motor base (310) swings with the assembly ball (250) as the fulcrum with multiple degrees of freedom.

2. The portable pruning device for garden maintenance work according to claim 1, characterized in that: The movable platform (100) has a reserved space for placing the pruning kit (300), and the bottom of the movable platform (100) is provided with universal casters (110).

3. The portable pruning device for garden maintenance work according to claim 1, characterized in that: The pressure ring (312) is fixed on the spherical assembly groove (311) by a quick-release component, and the inner diameter of the pressure ring (312) is smaller than the diameter of the assembly sphere (250).

4. The portable pruning device for garden maintenance work according to claim 1, characterized in that: An adjustable counterweight (321) is provided at the end of the handle (320).

5. The portable pruning device for garden maintenance work according to claim 1, characterized in that: The motor mount (310) is provided with at least three hydraulic locking cylinders (313), each hydraulic locking cylinder (313) including a radial piston chamber (3131) disposed around the spherical mounting groove (311) and a piston (3132) disposed in the radial piston chamber (3131), the end of the piston (3132) being inlaid with a friction liner (3133).

6. The portable pruning device for garden maintenance work according to claim 5, characterized in that: The handle (320) is equipped with a manual pump (322), which is connected in sequence to the hydraulic control pipeline of the release valve (323) and the hydraulic locking cylinder (313) via hydraulic pipelines.

7. The portable pruning device for garden maintenance work according to claim 6, characterized in that: The motor base (310) is provided with an oil reservoir (314), which is connected to the hydraulic locking cylinder (313) through a hydraulic pipeline and is used to store hydraulic oil for compensation.

8. The portable pruning device for garden maintenance work according to claim 1, characterized in that: The pruning unit (350) includes one of the following: electric shears, circular saw blade assembly, or hedge trimmer.

9. The portable pruning device for garden maintenance work according to claim 8, characterized in that: The telescopic rod (340) is provided with a male connector and a first bayonet fitting at the end thereof, and the tail of the pruning unit (350) is provided with a female connector matched with the male connector and a second bayonet fitting matched with the first bayonet fitting, so that the pruning unit (350) is fixed at the end of the telescopic rod (340) through the cooperation of the first and second bayonet fittings and is electrically connected through the cooperation of the female and male connectors.

10. The portable pruning device for garden maintenance work according to claim 9, characterized in that: The electric cable of the male connector is connected through the internal hollow channel of the telescopic rod (340) and is arranged on the control switch of the handle (320).

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